DM_castleIsland is a 1v1 deathmatch map created in UDK.
It is made using props of UDK itself, with some small details of myself.

The map is based upon the idea of "8" shapes, where you can always go in multiple different directions, but keep ending up in the same place. This is very important in a 1v1 map since you'll always run into eachother sooner or later.